Last Modified: 05-13-2024 6.11:8.1.0 Doc ID: RM100000001GOLJ
Model Year Start: 2020 Model: GR Corolla Prod Date Range: [01/2019 -           ]
Title: SEAT: SEAT HEATER SYSTEM: OPERATION CHECK; 2020 - 2025 MY Corolla Corolla Hatchback Corolla HV GR Corolla [01/2019 -        ]

OPERATION CHECK

CHECK THERMOSTAT IN FRONT SEAT CUSHION HEATER ASSEMBLY LH

(a) Remove the front seat cushion heater assembly LH.

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for Power Seat : Click here 2020 MY Corolla Corolla Hatchback Corolla HV GR Corolla [01/2019 - 03/2019]; SEAT: FRONT SEAT CUSHION HEATER (for Power Seat): REMOVAL 2020 - 2022 MY Corolla Corolla Hatchback Corolla HV GR Corolla [03/2019 - 09/2022]; SEAT: FRONT SEAT CUSHION HEATER (for Power Seat): REMOVAL 2023 MY Corolla Corolla Hatchback Corolla HV GR Corolla [09/2022 - 11/2022]; SEAT: FRONT SEAT CUSHION HEATER (for Power Seat): REMOVAL 2023 - 2025 MY Corolla Corolla Hatchback Corolla HV GR Corolla [11/2022 -        ]; SEAT: FRONT SEAT CUSHION HEATER (for Power Seat): REMOVAL

(b) Remove the front seatback heater assembly LH.

for Manual Seat : Click here 2020 MY Corolla Corolla Hatchback Corolla HV GR Corolla [01/2019 - 03/2019]; SEAT: FRONT SEATBACK HEATER (for Manual Seat): REMOVAL 2020 - 2022 MY Corolla Corolla Hatchback Corolla HV GR Corolla [03/2019 - 09/2022]; SEAT: FRONT SEATBACK HEATER (for Manual Seat): REMOVAL 2023 MY Corolla Corolla Hatchback Corolla HV GR Corolla [09/2022 - 11/2022]; SEAT: FRONT SEATBACK HEATER (for Manual Seat): REMOVAL 2023 - 2025 MY Corolla Corolla Hatchback Corolla HV GR Corolla [11/2022 -        ]; SEAT: FRONT SEATBACK HEATER (for Manual Seat): REMOVAL

for Power Seat : Click here 2020 MY Corolla Corolla Hatchback Corolla HV GR Corolla [01/2019 - 03/2019]; SEAT: FRONT SEATBACK HEATER (for Power Seat): REMOVAL 2020 - 2022 MY Corolla Corolla Hatchback Corolla HV GR Corolla [03/2019 - 09/2022]; SEAT: FRONT SEATBACK HEATER (for Power Seat): REMOVAL 2023 MY Corolla Corolla Hatchback Corolla HV GR Corolla [09/2022 - 11/2022]; SEAT: FRONT SEATBACK HEATER (for Power Seat): REMOVAL 2023 - 2025 MY Corolla Corolla Hatchback Corolla HV GR Corolla [11/2022 -        ]; SEAT: FRONT SEATBACK HEATER (for Power Seat): REMOVAL

(c) Connect the B front seat cushion heater assembly LH connector and F front seatback heater assembly LH connector.

*A

for Manual Seat

*B

for Power Seat

*a

Component without harness connected

(Front Seat Cushion Heater Assembly LH)

*b

Component without harness connected

(Front Seatback Heater Assembly LH)

(d) Apply auxiliary battery voltage and check the operation of the front seat heater according to the table below.

NOTICE:

To prevent the front seat heater from overheating, be sure to disconnect the auxiliary battery from the front seat heater immediately after this inspection is completed.

OK:

Auxiliary battery Connection

Specified Condition

Auxiliary battery positive (+) → Terminal O21-6*1

Auxiliary battery positive (+) → Terminal q1-1*2

  • Front seat cushion heater temperature 30 to 50°C (86 to 122°F)
  • Front seatback heater temperature 30 to 50°C (86 to 122°F)

Auxiliary battery negative (-) → Terminal O21-7 and O21-5*1

Auxiliary battery negative (-) → Terminal q1-2 and q1-3*2

  • *1: for Manual Seat
  • *2: for Power Seat

CHECK THERMOSTAT IN FRONT SEAT CUSHION HEATER ASSEMBLY RH

(a) Remove the front seat cushion heater assembly RH.

Click here 2020 MY Corolla Corolla Hatchback Corolla HV GR Corolla [01/2019 - 03/2019]; SEAT: FRONT SEAT CUSHION HEATER (for Manual Seat): REMOVAL 2020 - 2022 MY Corolla Corolla Hatchback Corolla HV GR Corolla [03/2019 - 09/2022]; SEAT: FRONT SEAT CUSHION HEATER (for Manual Seat): REMOVAL 2023 MY Corolla Corolla Hatchback Corolla HV GR Corolla [09/2022 - 11/2022]; SEAT: FRONT SEAT CUSHION HEATER (for Manual Seat): REMOVAL 2023 - 2025 MY Corolla Corolla Hatchback Corolla HV GR Corolla [11/2022 -        ]; SEAT: FRONT SEAT CUSHION HEATER (for Manual Seat): REMOVAL

(b) Remove the front seatback heater assembly RH.

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(c) Connect the C front seat cushion heater assembly RH connector and G front seatback heater assembly RH connector.

*a

Component without harness connected

(Front Seat Cushion Heater Assembly RH)

*b

Component without harness connected

(Front Seatback Heater Assembly RH)

(d) Apply auxiliary battery voltage and check the operation of the front seat heater according to the table below.

NOTICE:

To prevent the front seat heater from overheating, be sure to disconnect the auxiliary battery from the front seat heater immediately after this inspection is completed.

OK:

Auxiliary battery Connection

Specified Condition

Auxiliary battery positive (+) → Terminal O20-6

  • Front seat cushion heater temperature 30 to 50°C (86 to 122°F)
  • Front seatback heater temperature 30 to 50°C (86 to 122°F)

Auxiliary battery negative (-) → Terminal O20-7 and O20-5

CHECK THERMOSTAT IN REAR SEAT CUSHION HEATER LH (SEAT HEATER ASSEMBLY) (w/ Rear Seat Heater)

(a) Remove the rear seat cushion heater LH (seat heater assembly).

*a

Component without harness connected

(Rear Seat Cushion Heater LH (Seat Heater Assembly))

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(b) Apply auxiliary battery voltage and check the operation of the rear seat heater as shown in the table below.

NOTICE:

To prevent the rear seat heater from overheating, be sure to disconnect the auxiliary battery from the rear seat heater immediately after this inspection is completed.

OK:

Auxiliary battery Connection

Specified Condition

Auxiliary battery positive (+) → Terminal O126-1 (B)

Rear seat heater temperature 30 to 50°C (86 to 122°F)

Auxiliary battery negative (-) → Terminal O126-2 (E)

CHECK THERMOSTAT IN REAR SEAT CUSHION HEATER RH (SEAT HEATER ASSEMBLY) (w/ Rear Seat Heater)

(a) Remove the rear rear seat cushion heater RH (seat heater assembly).

*a

Component without harness connected

(Rear Seat Cushion Heater RH (Seat Heater Assembly))

Click here 2020 MY Corolla Corolla Hatchback Corolla HV GR Corolla [01/2019 - 03/2019]; SEAT: REAR SEAT CUSHION HEATER: REMOVAL 2020 - 2022 MY Corolla Corolla Hatchback Corolla HV GR Corolla [03/2019 - 09/2022]; SEAT: REAR SEAT CUSHION HEATER: REMOVAL 2023 - 2025 MY Corolla Corolla Hatchback Corolla HV GR Corolla [09/2022 -        ]; SEAT: REAR SEAT CUSHION HEATER: REMOVAL

(b) Apply auxiliary battery voltage and check the operation of the rear seat heater as shown in the table below.

NOTICE:

To prevent the rear seat heater from overheating, be sure to disconnect the auxiliary battery from the rear seat heater immediately after this inspection is completed.

OK:

Auxiliary battery Connection

Specified Condition

Auxiliary battery positive (+) → Terminal O125-1 (B)

Rear seat heater temperature 30 to 50°C (86 to 122°F)

Auxiliary battery negative (-) → Terminal O125-2 (E)